(Hydrogen atoms) can be explicit.Logical formLearned from5 sentences. A layer can be constituted-of-or-filled-with liquid hydrogen.Logical formLearned from5 sentences. Some (hydrogen atoms) may be bonded to an (oxygen atom).Logical formLearned from5 sentences. (Hydrogen bromide) may undergo an addition.Logical formLearned from5 sentences. A (hydrogen cyanide) can be gaseous.Logical formLearned from5 sentences. (Hydrogen peroxide) may undergo an activation.Logical formLearned from5 sentences. A (hydrogen gas) may undergo an ignition.Logical formLearned from5 sentences. A (hydrogen emission) can be atomic.Logical formLearned from5 sentences. A hydrogen may be vented.Logical formLearned from5 sentences. A (hydrogen bond) may be formed.Logical formLearned from5 sentences. Some helium may be mix_ined with a hydrogen.Logical formLearned from5 sentences. A bulk of a planet can be a hydrogen.Logical formLearned from5 sentences. Hydrogen can be in some forms.Logical formLearned from5 sentences. An (interstellar hydrogen gas) can be cool.Logical formLearned from5 sentences. A neutral hydrogen can be in the universe.Logical formLearned from5 sentences.